Hi, my car is completely stock right now and I was thinking of swapping the stock downpipe on my 2019 300 ST GPF to a pre GPF downpipe. Considering the car is stock, will i run into any problems such as backpressure with the turbo or anything else? Has anyone done it and if so is it a big job to do? Also wondering if this will fail MOT. I'm aware that I need to map out the GPF when removing it. Thanks in advance every answer will be very much appreciated.
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Pre GPF downpipe on GPF ST
- Thread starter Yxan
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You'll likely need the GPFs coded out via an updated MAP, although not 100% on that.
As for failing MOT, its a visual inspection only, so it would only fail if they know its meant to have a GPF fitted. So depends on how competent or thorough your MOT inspector is
As for failing MOT, its a visual inspection only, so it would only fail if they know its meant to have a GPF fitted. So depends on how competent or thorough your MOT inspector is
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